To install these modules, you can use a Puppetfile

forge "http://forge.enterprisemodules.com"

mod 'enterprisemodules/pg_config'               ,'x.x.x'

Then use the librarian-puppet or r10K to install the software.

You can also install the software using the puppet module command:

puppet module install
    --module_repository=http://forge.enterprisemodules.com
    enterprisemodules-pg_config